Jvc-XRD-400-SL-Service-Manual电路原理图.pdf

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1、SERVICE MANUALNo.A0001ContentsSafety precautionsTechnical descriptionDisassembly methodTroubleshootingPrecaution for servicing1-21-31-61-91-13VICTOR COMPANY OF JAPAN, LIMITEDOPTICAL DISC BUSINESS DIV. PERSONAL & MOBILE NETWORK BUSINESS UNITAV & MULTIMEDIA COMPANY 1644, Shimotsuruma, Yamato, Kanagawa

2、 242-8514, JapanNo.A0001Sep. 2000COPYRIGHT 2000 VICTOR COMPANY OF JAPAN, LTD.Printed in Japan200009 (S)MULTIPLE COMPACT DISC RECORDERPOWER1 TRACK ALLREPEATSPEEDERASEOVEROPEN/CLOSESOURCESPEEDREPEATFINALIZEPROGRAMREC4x 2x 1x1112123134145156167178189191020OPEN/CLOSEREC/PLAYSCSI AUTO RECXR-D400SLXR-D400

3、SLXR-D400SLE GermanyArea SuffixXR-D400SL1-2Safety precautions1. This design of this product contains special hardware and many circuits and components specially for safety purposes. For continued protection, no changes should be made to the original design unless authorized in writing by the manufac

4、turer. Replacement parts must be identical to those used in the original circuits. Services should be performed by qualified personnel only.2. Alterations of the design or circuitry of the product should not be made. Any design alterations of the product should not be made. Any design alterations or

5、 additions will void the manufacturers warranty and will further relieve the manufacture of responsibility for personal injury or property damage resulting therefrom.3. Many electrical and mechanical parts in the products have special safety-related characteristics. These characteristics are often n

6、ot evident from visual inspection nor can the protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in the Parts List of Service Manual. Electrical c

7、omponents having such features are identified by shading on the schematics and by ( ) on the Parts List in the Service Manual. The use of a substitute replacement which does not have the same safety characteristics as the recommended replacement parts shown in the Parts List of Service Manual may cr

8、eate shock, fire, or other hazards.4. The leads in the products are routed and dressed with ties, clamps, tubings, barriers and the like to be separated from live parts, high temperature parts, moving parts and/or sharp edges for the prevention of electric shock and fire hazard. When service is requ

9、ired, the original lead routing and dress should be observed, and it should be confirmed that they have been returned to normal, after re-assembling.5. Leakage current check (Electrical shock hazard testing)After re-assembling the product, always perform an isolation check on the exposed metal parts

10、 of the product (antenna terminals, knobs, metal cabinet, screw heads, headphone jack, control shafts, etc.) to be sure the product is safe to operate without danger of electrical shock.Do not use a line isolation transformer during this check.Plug the AC line cord directly into the AC outlet. Using

11、 a “Leakage Current Tester“, measure the leakage current from each exposed metal parts of the cabinet , particularly any exposed metal part having a return path to the chassis, to a known good earth ground. Any leakage current must not exceed 0.5mA AC (r.m.s.)Alternate check methodPlug the AC line c

12、ord directly into the AC outlet. Use an AC voltmeter having, 1,000 ohms per volt or more sensitivity in the following manner. Connect a 1,500 10W resistor paralleled by a 0.15 F AC-type capacitor between an exposed metal part and a known good earth ground.Measure the AC voltage across the resistor w

13、ith the AC voltmeter. Move the resistor connection to each exposed metal part, particularly any exposed metal part having a return path to the chassis, and measure the AC voltage across the resistor. Now reverse the plug in the AC outlet and repeat each measurement voltage measured any must not exce

14、ed 0.75 V AC (r.m.s.). This corresponds to 0.5 mA AC (r.m.s.). Good earth groundPlace this probe on each exposedmetal part.AC VOLTMETER(Having 1000 ohms/volts,or more sensitivity)1500 10W0.15 F AC TYPE!CAUTIONBurrs formed during molding may be left over on some parts of the chassis. Therefore, pay a

15、ttention to such burrs in the case of preforming repair of this system.XR-D400SL1-3Technical descriptionCD-R/RW recorder for digital audio CD-R/RW drive for PCFig. 1 Fig. 2Table 1 Comparison of Recording and PlaybackAs its name implies, the XR-D400SL Multiple Compact Disc Recorder provides multiple

16、functions, these include a CD-R/RW recorder for digital audio and a CD-R/RW drive for a PC.As the XR-D400SL can be used as a CD-R/RW recorder for digital audio in the dubbing/ recording modes, it is classified as specific equipment under the private recording royalties system. As a result, discs rec

17、orded with this recorder are distinguished from those recorded with a PC drive.In the SCSI mode, the XR-D400SL can be used as a CD-R/RW drive for a PC by connecting it through the SCSI interface. However, it is not possible to use the source disc tray as the dubbing source.The dubbing source disc tr

18、ay of the XR-D400SL incorporates a CD-ROM drive and a REC/PLAY disc tray, which is the dubbing destination and incorporates the CD-R/RW drive (XR-RWD400S) for a PC.The XR-RWD400S can also be used as a CD-R/RW recorder for digital audio according to the setting of the control microcomputer.The XR-RWD

19、400S incorporates a flash memory to facilitate firmware read and write. The firmware is the program used in controlling the drive.The use of a flash memory makes it possible to rewrite programs easily.The recording media royalties are limited to special discs (with a logo mark as shown in Fig. 1) co

20、ntaining the recording of ID information, which are not recorded in the recording media for PCs.XR-D400SLConfiguration of the XR-D400SLCD-R/RW recorder for digital audioRecording PlaybackCD-R/RW recorder for digital audio Possible with discs having a logo as in Fig. 1 only Possible with discs having

21、 a logo as in Figs. 1 and 2CD-R/RW drive for PC Possible with discs having a logo as in Figs. 1 and 2 Possible with having a logo as in Figs. 1 and 2XR-D400SL1-4The XR-D400 incorporates the SCMS (Serial Copy Management System) and the RID (Recorder Unique Identifier) functions.SCMS is used to limit

22、digital copies to one generation only. The principles are shown in Fig. 3.With RID, the RID codes are written into discs which are as specified in the Orange Book Parts II and III. The codes contain the manufacturers name, product name and machine number to enable the tracing of illegal copies.Digit

23、al recording Digital recordingFig. 3 Principles of SCMSFig. 4 shows the structure of a CD-R disc.In recording, a laser beam having the same wavelength as the CD beam (780 nm) but of tens times higher power is irradiated from the substrate surface to the groove.This irradiation causes thermal deforma

24、tion of the organic pigment layer forming pits in it.The organic pigments include cyanine, phtalocyanine and azoic dyes and the reflective layer uses gold or silver materials.In playback the laser beam reads the pits recorded in the pregroove.The thermal deformation of the organic pigment layer cann

25、ot be recovered to the original condition. As a result, the CD-R discs cannot be rewritten and only additional writing is possible with them.Fig. 5 shows the structure of a CD-RW disc.The CD-RW uses a phase-changing recording material in the recording layer.With the CD-RW, a laser beam with regulate

26、d power and cooling time is irradiated to form a crystalline phase (erased status) and amorphous phase (recorded state) on the polygroove and data is reproduced according to the difference in reflectivity of the two phases.An amorphous state can be obtained by quick cooling after irradiation by a st

27、rong laser beam.The phase-changing recording material is made of a compound of silver, indium, antimony and tellurium, and rewriting is possible up to about 1000 times.As the reflectivity at 780 nm of the CD-RW is lower than the CD-R, the RF amp gain should be changed in order to play a CD-RW disc.S

28、CMS and RID functionsRecording on CD-R discsRecording on a CD-RW discComparison between the CD-R and the CD-RWLabel printed surfaceProtective layer grooveReflective layerOrganic pigment layerSubstratepregrooveTrack pitch1.6 mLaser beamSignal surfaceFig. 4Printed surfaceProtective layerAluminum refle

29、ctive layerUpper protective layerRecording layerLower protective layerSubstratepolygrooveSignal surfaceLaser beamFig. 5CD-RCompact Disc Recordable CD-RWCompact Disc RewritableSpecificationsLaser reflectivityRecording powerPlayback on CD playerOrange Book Part II65% or more4 to 11 mWPossibleOrange Bo

30、ok Part III15% to 25%8 to 14 mWImpossibleTable 2XR-D400SL1-5CD-R/RWCD-R/RWLead-in areaThis area records the TOC (Table Of Contents) including the number of tracks in the disc, track-start position information, etc.Data This area contains the recording of actual audio signals, file data, etc.The unit

31、 used in the data area is the track. Usually, music CDs use a track per song selection while the CD-ROM discs basically uses only one track.Lead-out This area is used to indicate that the data in the disc has reached the end.The combination of the lead-in, data and lead-out areas is referred to as a

32、 single session.A disc containing multiple sessions is called a multi-session disc. The CD-EXTRA belongs to this kind of disc.PCA (Power Calibration Area)This area is used to regulate the laser power in data writing.Its data optimizes laser power according to external factors such as the medium type

33、, supply voltage and operating temperature. The PCA provides an area for use in 99 times of test writing.PMA (Program Memory Area)This area contains the recording of the start and end positions of the tracks. When a disc is not finalized in program recording, this area is used to obtain the prelimin

34、ary TOC data.PMA Track 1Track 1Track 1Track 2Track 2 Lead-outPMAPMA Lead-inRecording method of the CD-R/RWAs shown in Fig. 6, the recording areas of a CD-ROM and a CD-R/RW are different.These discs use two recording areas in addition to the areas used for data recording by ordinary CD discs.Finaliza

35、tionFinalization refers to writing the preliminary TOC data in the PMA into the lead-in and lead-out areas.When a disc is not finalized, its TOC data is recorded exclusively in the PMA.Since ordinary CD players cannot read the PCA and PMA, non-finalized discs can be read only with a REC/PLAY machine

36、 such as the XR-D400. This makes possible addition writing on the disc.When a disc is finalized, its lead-in, data and lead-out areas are written properly and the disc becomes a disc complying with the Orange Book specifications.Fig. 7 shows the finalization procedure.2 areas for CD-ROMInner directi

37、on Outer directionPCA PMA Lead-in Data Lead-outFig. 6Fig. 7Before finalizationTrack rewritingAfter finalization(Preliminary TOC)TOC dataXR-D400SL1-61. Remove the 4 screws A from both sides of the top cover.2. Remove the 4 screws B from the rear of the top cover, then remove the stop cover.Disassembl

38、y methodRemoving the top cover (Figs. 1 & 2)1. Remove the top cover.2. Remove the 3 screws C that retain the front panel from the bottom. (Fig. 3)3. Unplug the connector A from the power supply board (Fig. 4) and the flat wire from the control board (Fig. 5).4. Disengage the 2 claws D from the front

39、 panel and remove the front panel. (Figs. 4 and 5)Removing the front panel (Figs. 3 to 5)1. Remove the stop cover. 2. Unplug connector B from the power supply board (Fig. 4).3. Remove the 6 screws E from the rear panel (Fig. 6).4. Remove the 2 screws F retaining the SCSI connector, then remove the r

40、ear panel.(CAUTION) Screw F retaining the SCSI connector functions to protect the connector. Be sure to remove it as a last task in disassembly or a first one in assembly.Removing the rear panel (Figs. 4 & 6)Front panelConnector BConnector AFlat wireAABBCDDGGGGFig. 1Fig. 2Fig. 3Fig. 5Fig. 4XR-D400SL

41、1-7FEECD-ROM driveCD-R/RW drivePower supplyconnectorsControl cableAudio signal connectorHHFlat cableFlat cableConnectorII1. Remove the top cover.2. Remove the rear panel.3. Unplug the connectors from the drives (CD-ROM drive: power supply connector and control cable connector. CD-R/RW drive: power s

42、upply connector, control cable connector and audio signal connector). (Fig. 7)4. Remove a total of 8 screws retaining the drives, from the side panels. (Figs. 4 and 5)5. Take out each drive in the rear direction.Removing the CD-ROM and CD-R/RW drives(Figs. 4, 5 and 7)1. Remove the top cover.2. Remov

43、e the rear panel.3. Remove the CD-R/RW drive.4. Remove the 6 screws H retaining the cover, then remove the cover. (Figs. 8 and 9)5. Stand up the board and unplug the 2 flat cables and 1 connector. (Fig. 10)6. Remove the 4 screws I retaining the circuit board. (Fig. 11)7. Unplug 1 flat cable and remo

44、ve the circuit board. (Fig. 12)Removing the CD-R/RW drive board(Figs. 8 to 12)Fig. 6Fig. 7Fig.8Fig. 9Fig. 12Fig. 10Fig. 11XR-D400SL1-8JJCD-ROM driveCD-R/RW driveTray eject holeTray eject hole 1. Remove the top cover.2. Remove the front panel.3. Remove the 13 screws J retaining the board.Removing the

45、 front board (Fig. 13)1. Remove the top cover.2. Remove the front panel.3. When removing a disc from the CD-ROM drive (upper drive), insert a thin wire or similar object into the tray eject hole at the right end of the drive. When the drive comes out, pull it out toward the front.4. When removing a

46、disc from the CD-R/RW drive (lower drive), insert a thin wire or similar object into the tray eject hole at the left end of the drive. When the drive comes out, pull it out toward the front.Removing the disc (Fig. 14)Fig. 13Fig. 14XR-D400SL1-9NOYESYESNOOKNONONONOYESYESYESYESYESYESYESNONOTroubleshoot

47、ing (For repairing the audio CD dubbing)POWER button ONCheck the CN991 and S1034on the Front board.Does the POWERindicator light?Are the pins and of the CN991on the Front board short-circuitedGo to the “PowerSupply Operation“.Can the tray beopened/closed with theOPEN/CLOSE button?Go to the“OPEN/CLOS

48、E Operation“.Can the SOURCE discdrive read theTOC of the CD?Go to the“Reproduction Operation“Can the REC/PLAY discdrive play the CD?Is the audio output fromthe CD in the REC/PLAYdisc drive?Can the data be writtenin the REC/PLAYdisc drive?Are the front keys andindicators normal?Check the generaloperations.Go to the“Audio Operation“.Go to the“Write Operation“